Kristi Castro has Published 105 Answers

Dining Philosophers Problem (DPP)

Kristi Castro
Kristi Castro
Published on 11-Oct-2018 03:03:58
The dining philosophers problem states that there are 5 philosophers sharing a circular table and they eat and think alternatively. There is a bowl of rice for each of the philosophers and 5 chopsticks. A philosopher needs both their right and left chopstick to eat. A hungry philosopher may ... Read More

Process Synchronization in Linux

Kristi Castro
Kristi Castro
Published on 11-Oct-2018 02:21:32
Process synchronization in Linux involves providing a time slice for each process so that they get the required time for execution. The process can be created using the fork() command in Linux. The creating process is called the parent process and the created process is the child process. A child ... Read More

Major issues with Multi-threaded Programs

Kristi Castro
Kristi Castro
Published on 11-Oct-2018 01:08:18
Multithreaded programs allow the execution of multiple parts of a program at the same time. These parts are known as threads and are lightweight processes available within the process. Threads improve the application performance using parallelism. They share information like data segment, code segment files etc. with their peer ... Read More

Methods for Handling Deadlocks

Kristi Castro
Kristi Castro
Published on 11-Oct-2018 00:47:03
Deadlock detection, deadlock prevention and deadlock avoidance are the main methods for handling deadlocks. Details about these are given as follows: Deadlock Detection Deadlock can be detected by the resource scheduler as it keeps track of all the resources that are allocated to different processes. After a deadlock is detected, ... Read More

Zombie vs Orphan vs Daemon Processes

Kristi Castro
Kristi Castro
Published on 11-Oct-2018 00:13:27
Details about the zombie, orphan and daemon processes are given as follows: Zombie Processes A zombie process is a process whose execution is completed but it still has an entry in the process table. Zombie processes usually occur for child processes, as the parent process still needs to read its ... Read More

Difference between Process and Thread

Kristi Castro
Kristi Castro
Published on 10-Oct-2018 23:52:33
A process is an active program i.e. a program that is under execution. It is more than the program code as it includes the program counter, process stack, registers, program code etc. Compared to this, the program code is only the text section. A thread is a lightweight process that ... Read More

Starvation and Deadlock

Kristi Castro
Kristi Castro
Published on 10-Oct-2018 23:35:03
Starvation and Deadlock are situations that occur when the processes that require a resource are delayed for a long time. However they are quite different concepts. Details about starvation and deadlock are given as follows: Starvation Starvation occurs if a process is indefinitely postponed. This may happen if the process ... Read More

Message Passing Model of Process Communication

Kristi Castro
Kristi Castro
Published on 10-Oct-2018 22:32:54
Process communication is the mechanism provided by the operating system that allows processes to communicate with each other. This communication could involve a process letting another process know that some event has occurred or transferring of data from one process to another. One of the models of process communication is ... Read More

The Benefits of Multithreaded Programming

Kristi Castro
Kristi Castro
Published on 10-Oct-2018 20:12:21
Multithreading allows the execution of multiple parts of a program at the same time. These parts are known as threads and are lightweight processes available within the process. So multithreading leads to maximum utilization of the CPU by multitasking. Some of the benefits of multithreaded programming are given as follows: ... Read More

Different Operations on Processes

Kristi Castro
Kristi Castro
Published on 28-Sep-2018 15:49:15
There are many operations that can be performed on processes. Some of these are process creation, process preemption, process blocking, and process termination. These are given in detail as follows: Process Creation Processes need to be created in the system for different operations. This can be done by the following ... Read More
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